check if brotli is installed

Author: enoch85

lets-encrypt/activate-tls.sh

@@ -104,6 +104,12 @@ fi
 # To get the correct version for the Nginx conf file
 check_php
 
+# Check Brotli support
+if is_this_installed libnginx-mod-brotli
+then
+    BROTLI_ON="brotli on;"
+fi
+
 # Generate wordpress_tls_domain.conf
 if [ ! -f "$tls_conf" ]
 then
@@ -121,7 +127,7 @@ server {
     listen 443 ssl;
     listen [::]:443 ssl;
     http2 on;
-    brotli on;
+    $BROTLI_ON
 
     ## Your website name goes here.
     server_name $TLSDOMAIN;